Barnivore note (February 2014):
Although, it seems to be very unlikely, on the red wines, check the label for mention of eggs. If eggs aren't mentioned, they're good!

Company email (February 2014):
"Our red wines are suitable for Vegans, however some gelatine may be used in our whites, therefore wouldn’t be suitable. Occasionally egg whites are used in reds but at this point in time we have not had to use any in our reds." [Company uses diatomaceous earth]